Conductive polymer gas sensor for quantitative detection of methanol in Brazilian sugar-cane spirit

Péres, Laura O.; Li, Rosamaria Wu Chia; Yamauchi, Elaine Yuka; Lippi, Renata; Gruber, Jonas

doi:10.1016/j.foodchem.2011.08.014

Cited by 51 publications

(22 citation statements)

References 22 publications

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“…The detection of volatile organic compounds (VOCs) using a reliable gas sensor is of great significance for health‐care applications, air quality monitoring, aerospace technology, and food processing . However, low sensitivity, long response time, and poor selectivity always resulted in low reliability, thus hindering the further development of a VOC‐based gas sensor.…”

Section: Introductionmentioning

confidence: 99%

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Zhou

Liu

Zhang

et al. 2018

Adv Materials Inter

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hybrid compositions (such as 0D-1D and 1D-1D composites) offers an intelligent way to optimize the sensing ability. [12] The appealing advantage of using 1D nanostructure as backbone can achieve a uniform distribution of secondary nanomaterials, leading to large surface areas and synergistic effect in heterojunctions. Particularly, p-type Mn 3 O 4 has attracted much attention and been considered as an excellent candidate for some effective redox reactions because of its polymorphism and coexistence of mix valence. [13] In addition, the nonprecious transition metal oxide is also environmental friendly, low cost, and abundant. [14][15][16][17] For gas sensors, using pure Mn 3 O 4 as sensing materials cannot always meet the growing demands of high sensitivity, good selectivity, and excellent stability. To improve the sensing performance, many efforts, including fabricating pores and hierarchical structure, coating with conductive materials and doping noble metal, have been reported. [18][19][20][21] In addition, constructing p-n heterostructure is also a promising approach based on the sensing mechanism of charge carrier separation and formation of charge depletion layer. The multivalence properties and synergistic catalytic effects between Mn 3 O 4 and additive n-type materials could provide a highway for electron transfer, which encourages us to prepare Mn 3 O 4 with novel structure or morphology combined with the outstanding multifunctional material to improve their electrosensing properties.Herein, a 1D-1D branched heterostructure based on the combination of Mn 3 O 4 nanowires with Zn 2 SnO 4 nanorods by using a two-step hydrothermal route was designed. The modified structures with different composition ratios were also investigated. Results showed the branch-like Mn 3 O 4 /Zn 2 SnO 4 -based gas sensor displayed remarkable acetone selectivity behaviors. Notably, compared with pure p-type Mn 3 O 4 nanowires, the Mn 3 O 4 /Zn 2 SnO 4 heterojunction with dense branch structure exhibited higher response at 240 °C. Such a unique hybrid material could retain its pristine nanostructure after 20 d cycle acetone gas measurement, which facilitated stable reaction between target gas and sensing layer, revealing good stability and reproducibility. Results and Discussion Material Synthesis and Structural CharacterizationFigure 1a illustrates the two-step hydrothermal synthesis method of Mn 3 O 4 /Zn 2 SnO 4 heterostructures. γ-MnOOH Hybrid 1D nanomaterials with hierarchical structure have received a great deal of attention as sensing materials for gas sensors due to their high surface area, excellent catalytic performance, and robust structure. Novel Zn 2 SnO 4 nanorod-decorated Mn 3 O 4 nanowire 1D nanostructures are prepared by a two-step hydrothermal method and subsequent heat treatment for application in gas sensors. The branch-like Mn 3 O 4 /Zn 2 SnO 4 composite-based sensor exhibits high sensitivity and excellent selectivity for the detection of acetone gas. Importantly, the sensitivity of acetone-gas sensor can be imp...

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Section: Introductionmentioning

confidence: 99%

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Zhou

Liu

Zhang

et al. 2018

Adv Materials Inter

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“…To monitor the air pollution, attempts have been made to develop a variety of gas sensor using optical fibers, conducting polymers, potentiometric electrodes, infrared devices and metal oxides [5][6][7][8][9]. Among these methods, gas sensors which rely on the metal oxide semiconductor nanomaterials such as SnO 2 , WO 3 , TiO 2 , Fe 2 O 3 , In 2 O 3 and ZnO, have attracted considerable attention due to their high sensitivity, low cost and processing reliability [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Er-doped ZnO nanofibers for high sensibility detection of ethanol

Sun

Zhao

et al. 2015

Applied Surface Science

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“…Recently, gas sensors have been extensively used in a variety of fields such as security, medical monitoring, food safety, especially detection of toxic gases . Among all the toxic gases, hydrogen sulfide (H 2 S) exists widely both in nature and industrial areas where it is used as a process gas and generated as byproduct .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of α‐Fe₂O₃ porous array film and its crystallization effect on its H₂S sensing properties

Duan

Kong

et al. 2016

ChemistrySelect

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The a-Fe 2 O 3 porous array film is synthesized based on an alternative and flexible route by transferring a solution-dipped selforganized colloidal template onto device substrate and subsequent annealing treatment. The sensing properties of the film to H 2 S and other interfering gases were studied in detail. It was observed that porous array film annealed at 400 o C showed optimized sensing performance with both higher response and better selectivity to H 2 S than those annealed at 300 o C, 500 o C and 600 o C. Detailed researches indicated the grain size of the a-Fe 2 O 3 porous array film was closely related to annealing temperature, in which the sensing properties to H 2 S was deeply affected by the crystallization effect. A possible gas sensing mechanism was thus proposed. Generally, the higher crystallinity leads to better selectivity while large grain size will decrease response. This work gives an alternative way to realize H 2 S detection with high response and selectivity.[a] Z.

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Conductive polymer gas sensor for quantitative detection of methanol in Brazilian sugar-cane spirit

Cited by 51 publications

References 22 publications

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Er-doped ZnO nanofibers for high sensibility detection of ethanol

Fabrication of α‐Fe₂O₃ porous array film and its crystallization effect on its H₂S sensing properties

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Conductive polymer gas sensor for quantitative detection of methanol in Brazilian sugar-cane spirit

Cited by 51 publications

References 22 publications

Constructing Hierarchical Heterostructured Mn3O4/Zn2SnO4 Materials for Efficient Gas Sensing Reaction

Constructing Hierarchical Heterostructured Mn3O4/Zn2SnO4 Materials for Efficient Gas Sensing Reaction

Er-doped ZnO nanofibers for high sensibility detection of ethanol

Fabrication of α‐Fe2O3 porous array film and its crystallization effect on its H2S sensing properties

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Product

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Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Fabrication of α‐Fe₂O₃ porous array film and its crystallization effect on its H₂S sensing properties